diff --git a/CustomTitleBarWindowDrag/README.md b/CustomTitleBarWindowDrag/README.md
index 342d809bd9a6ee5f02367a4364038df8450c27b3..d00efac7c51fedae5b44fe80972e1a6c9157de88 100644
--- a/CustomTitleBarWindowDrag/README.md
+++ b/CustomTitleBarWindowDrag/README.md
@@ -21,6 +21,9 @@
 └──entry/src/main/resources                 // 应用资源目录
 ```
 
+### 使用说明
+ - 点击应用中间的蓝色区域，可拖动应用。
+
 ### 相关权限
 
 不涉及
diff --git a/CustomTitleBarWindowDrag/entry/src/main/ets/entryability/EntryAbility.ets b/CustomTitleBarWindowDrag/entry/src/main/ets/entryability/EntryAbility.ets
index 77569cfe3babdcd0b4d008dd693d7aca52fb5d1a..8e7365838d7874bf3999e64d5a34d55179e24245 100644
--- a/CustomTitleBarWindowDrag/entry/src/main/ets/entryability/EntryAbility.ets
+++ b/CustomTitleBarWindowDrag/entry/src/main/ets/entryability/EntryAbility.ets
@@ -14,9 +14,9 @@
  */
 
 import { AbilityConstant, ConfigurationConstant, UIAbility, Want } from '@kit.AbilityKit';
+import { BusinessError } from '@kit.BasicServicesKit';
 import { hilog } from '@kit.PerformanceAnalysisKit';
 import { window } from '@kit.ArkUI';
-import { BusinessError } from '@kit.BasicServicesKit';
 
 const DOMAIN = 0x0000;
 
diff --git a/CustomTitleBarWindowDrag/entry/src/main/ets/pages/Index.ets b/CustomTitleBarWindowDrag/entry/src/main/ets/pages/Index.ets
index f48b004992d001bf13a88a75b454e2da6c3f7efb..ec0f151b2a319a6a2b4c04e5a37792f71177819d 100644
--- a/CustomTitleBarWindowDrag/entry/src/main/ets/pages/Index.ets
+++ b/CustomTitleBarWindowDrag/entry/src/main/ets/pages/Index.ets
@@ -14,8 +14,8 @@
  */
 
 // [Start drag_sample]
-import { window } from '@kit.ArkUI';
 import { BusinessError } from '@kit.BasicServicesKit';
+import { window } from '@kit.ArkUI';
 
 const COLUMN_WIDTH = 108;
 const COLUMN_TOP = 50;
@@ -25,7 +25,7 @@ const COLUMN_LEFT = 100;
 @Component
 struct Index {
   // get the window manager from AppStorage
-  private windowStage = AppStorage.get('window') as window.WindowStage;
+  windowStage: window.WindowStage = AppStorage.get('window') as window.WindowStage;
 
   build() {
     Column() {